The Powermat for 2 Devices allows you to wirelessly charge two Duracell Powermat-enabled devices-including the iPhone 4/4S (Wireless Case sold separately) or our Portable Backup Battery (sold separately). To use, simply set the Portable Backup Battery and/or enabled iPhone 4/4S on the Powermat to start charging. The bleep lets you know that your device is connected and charging. When it's fully charged, take your device and the Portable Backup Battery to power up on the go. Wireless Case required to enable phone and sold separately. Portable Backup Battery sold separately. Phone sold separately. Also available in black. Are you new to Duracell Powermat? Get with the system. Our 24-Hour Power System has everything you need to get started: Powermat for 2 Devices, Wireless Case for iPhone 4/4S, and a Portable Backup Battery. PMA is the standard for smart and environmental wireless power backed by AT&T, Starbucks, P&G, Powermat and dozens of global leaders, and deployed at leading venues including in select Delta Air Terminals and Delta Sky Clubs, Westfield Malls, at Madison Square Garden, Barclays Center and in Jay-Z's 40/40 Club. Duracell PowerMats are PMA compatible (not compatible with Qi). To enjoy wireless charging enable your phone with a Duracell Powermat AccessCase and place the phone on the PowerMat or connect your phone to a Duracell Powermat portable battery and then place the portable battery on the PowerMat (both sold separately).